add TypeContext test file

Author: endel

test/TypeContext.test.ts

@@ -0,0 +1,27 @@
+import { Schema, type, MapSchema, TypeContext } from "../src";
+import * as assert from "assert";
+import { entity } from "../src/annotations";
+
+describe("TypeContext", () => {
+    it("should register all inherited classes", () => {
+        class Pokemon extends Schema {
+            @type("string") name: string;
+        }
+
+        class Unown extends Pokemon {
+            @type("number") power: number;
+        }
+
+        @entity class UnownA extends Unown {}
+        @entity class UnownB extends Unown {}
+
+        class MyState extends Schema {
+            @type({ map: Pokemon }) pokemons = new MapSchema<Pokemon>();
+        }
+
+        const context = new TypeContext(MyState);
+
+        assert.strictEqual(context.schemas.size, 5);
+    })
+
+});